The list of futures positions reflects the positions of several futures companies with the largest positions, which can be roughly regarded as the trend of large orders. The sum of multiple orders in the Dragon and Tiger List can be subtracted from the sum of empty orders. If it is positive, it is a net multi-order, indicating that there are relatively more people watching more futures; If it is negative, it is a short order, indicating that there are relatively more people who are bearish on big futures companies. If you have data for a long time, you can refer to the bollinger band index of the stock price, and the operation method is similar to the bollinger band of the stock price.